Question

Assertion : Work function of aluminium is 4.2 eV. Emission of electrons will not be possible if two photons, each of energy 2.5 eV, strike an electron of aluminium.
Reason : For photoelectric emission, the energy of each photon should be greater than the work function of aluminium.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion